<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
        function Person(name,age,sex){
            this.name = name
            this.sex = sex 
            this.age = age
        }
        let per = new Person('feng',24,'man')
        console.dir(per)
        console.dir(Person);
        
        console.log(per.constructor == Person)
    </script>
</body>
</html>